<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body >
	<div id="app-6">
		<h1 v-if="awesome">1</h1>
		<h1 v-else>213</h1>
	</div>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/vue/2.6.9/vue.js"></script>
<script>
   var app = new Vue({
		 el: '#app-6',
		 data:{
			awesome:false,
		 },
   }); 
</script>
</html>